A digital oscilloscope, also called a digital scope or DSO, is a type of electronic test equipment that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis). In a digital oscilloscope, the vertical input, instead of driving the vertical amplifier, is digitised by an analog to digital converter to create a data set that is stored in the memory of a microprocessor. Digital scopes under 2GHz are used in: Embedded Design & Debug, Mixed Signal Design & Debug (MSO), Low-speed Serial Bus Debug, Automotive Design, Digital Design, Power Design, Video Design & Service and Manufacturing Testing.